[python-win32] Re: system() fails, win32process succeeds

[Roger Upole]

"RayS" wrote:

> Someone might be interested: I ran across an unexpected process issue this 
> week.
> We have a converter app that is part of a suite, when it runs it needs to 
> call  an external DOS exe briefly (the exe does bit-shifting in a file 
> etc.)  I originally used system(), but found that _if_ one other 
> particular app was running (a huge resource hog - 99% CPU usage polling 
> the A/Ds) the call would fail to execute properly. I switched to 
> win32process and SetPriorityClass() to REALTIME and the call always 
> succeeds.
> win32con.SW_HIDE is also set in StartupInfo.
> http://wiki.wxpython.org/index.cgi/Capturing_20DOS_20Output_20in_20a_20wxWindow
> is a very helpful process example.
>
> Ray

I ran into something similar a while back that turned out to be a deficiency 
in the called
program.  It wasn't taking into account the fact that it might not be able 
to acquire
resources in a timely manner.  If you use os.popen to run the executable, 
can you get
any kind of error message back ?

      Roger